yangkai yangkai yangkai: Processor: QEMU Virtual 2.4.0.1 @ 2.40GHz (8 Cores), Motherboard: QEMU Standard PC (i440FX + PIIX 1996), Chipset: Intel 440FX- 82441FX PMC, Memory: 1 x 16384 MB RAM QEMU, Disk: 158GB, Graphics: Cirrus Logic GD 5446, Network: Red Hat Virtio device OS: Ubuntu 12.04, Kernel: 3.5.0-23-generic (x86_64), Compiler: GCC 4.8.4, File-System: ext4, Screen Resolution: 800x600, System Layer: QEMU 2.4.0.1 Flexible IO Tester 2.1.13 Type: Random Read - IO Engine: Sync - Buffered: Yes - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory - Result: MB/s MB/s > Higher Is Better yangkai . 62.67 |==============================================================